98972639 has 2 divisors, whose sum is σ = 98972640. Its totient is φ = 98972638.

The previous prime is 98972633. The next prime is 98972663. The reversal of 98972639 is 93627989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98972639 - 2²⁴ = 82195423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98972633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49486319 + 49486320.

It is an arithmetic number, because the mean of its divisors is an integer number (49486320).

Almost surely, 2^98972639 is an apocalyptic number.

98972639 is a deficient number, since it is larger than the sum of its proper divisors (1).

98972639 is an equidigital number, since it uses as much as digits as its factorization.

98972639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 98972639 is about 9948.4993340704. The cubic root of 98972639 is about 462.5638795624.

The spelling of 98972639 in words is "ninety-eight million, nine hundred seventy-two thousand, six hundred thirty-nine".